Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eda3d27072213c8d3fa138379ae30da9b7c4894ce75bf18f2b2fedb641e34a93' 
  AND token = 'lHzh0EyxKO3UVwNQC9fZOogVomjksVi7Vfqo/K18Lfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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