Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7d5cf1aa6f9a73eed917eabd4014c3bd0ec49dc680cb85e9b2834ab690e90fb' 
  AND token = 'bPfK8whkj7w3FpNp6byAd7gZ5a2NmXhJu1XH9wnPIiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}