Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b781cc112a51f6b95c6043489bbff7d50c3c712f38ee2309963cfd87ac3a0f3f' 
  AND token = 'hjosJnGB0DgOjwoUDC93b5CFkyV5C2iP+n6DBo1GEK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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