Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4c9e624cfa0c84f8b003517cce399dc32d2e2ccabccba7673a7795590b3851ed' 
  AND token = '7ZIhefo//QOc2248p0lFKqYWgRjJ0wZyjY1RW3W6cQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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