Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0d977d5306a12cd330db8b5ddd8435dda02b323fb2c1d0f79fdf0a434eb7606' 
  AND token = 'J0QP8Lx2AE0RWEkS92KhunyQ6bKC6hDiklYp1q0XEE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}