Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9645c7ca5524a75b1c5a3be8c0cacb39da4a8656d49b3df5c851651eeaa1e893' 
  AND token = 'm8KHmhYVg32fkPGW9gSjIR+R4s+E9Md1CPWA4zHUZtU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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