SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f4607f41360e2a8eb596013e2f28476457b481aeaa5c1c7acfd6b34349fce75' 
  AND token = 'Jx1+/8HraY2cn7xqgQB7ZDIw/S5NYfhR75Nd7tK+UzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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