Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c34c6184df63266f21edd194de7c37b10c9899a4bbc9d576944fd69b661def0' 
  AND token = 'EP92KqqMR3pzTpYQvbFt0BVTu0EFnoWzaNZL19t8Cm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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