Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '612bbf297253ca7d8fa4cd17b3f532f6c5f13d18160402bb8fb2cf0ef84b55f1' 
  AND token = 'R1R7787X4CLr7i7e4j+k+9RYauBTacxFg2+fkMvgMrw=' 
  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"
    }
  }
}