Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e4d25116f85a54ce3a27ad513136c1e211be95ef6f919b7395d31b96a41ef7b' 
  AND token = 'ftqPXNGMX+d/CCqxsnx6+4igiCJamh9ek6bLxjW96hM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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