Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c2f689eeeb8273edbe3e49130d1f24aaf7db2a7589212a9031120332f2877f09' 
  AND token = '7Q+paCUPFrtDrJ5Cp3OQefkonPwYGmY03U5BJsI4k9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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