Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1eede8212b574b8738c58081cfba22f944993007dd7b56f23569d6f3603e078' 
  AND token = 'QtsqbU6XvFtxSk7IsB23pRyxXcJeQ5jNhunw5zSsHCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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