Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca7d33877b2ce2dbad8cdbc493170702fcb38f14805b28ea27e125e57a809c92' 
  AND token = 'E37+GYn2MKhY8/W7Pinu34DEo29KUIrPFt3JB+hMvqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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