Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f854edbf5aa4d8a18278c8d5ac3203974f2b42e716cb22d5e33e380500d10c2' 
  AND token = 'PEwxLZuYtHYc5C2gpRqhG1sfAqLEPIc7b26w3xI5/Rw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}