Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a508e6f0afa366f47136c05c4f953f67cd3f3e34ca769ccbcd4b2d5127eb634b' 
  AND token = 'k+b1UABWGoSBP2z46kZZC7f3EnhnDzxp9FNdNbS9jFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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