SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eeb36bfd149496533aa067f81b6546603450309873f7246f63d54f5aecb715a0' 
  AND token = 'Hhp3JVOgVoYkYXQOuVGfJHnBGeZ9v1aXrXm6mhGXptA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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