Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de4c5d43ea59cd58e2c4fae6f7ec9ff93d385fe793acf44140282dbfbdac15a1' 
  AND token = '8YIFoISo5yVkNF9J2PlEQcMG0kPdqU46+U/1+6iDFdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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