Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea58a5fb9ff9f2c785efbb1ebeed5fc4c520748a02cb6618a745d7d13f6bf3d5' 
  AND token = '1SXa6HCVykM7r1V5YPSfwxtB4XNUdbWh3misAzYndvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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