Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d5605dad895fcf8b15e65240f4fe1b988d2bc8ec1c478255c97e9ad1957f1a5' 
  AND token = 'uUZqbnd0HQqrL7Z65xEQF76dTy3BOuWDtmyQOW9rI2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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