Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60d99511ced23314f2b4848fe8bd3dfac54ffbf84bbebdf66786b9ce3be920ab' 
  AND token = 'Eu84yWG+dRNGQ3AHiqpYChTEIKIBgxXSdnRkbEwHh5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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