Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5feec96335a2f9f3409897f7cb84d9e266f427878b082f65f6e33b055646ecf' 
  AND token = 'K9ZZXH8NER6jesebHL4yT6QI2tzwBI8R9SAkTQ/lfDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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