SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f70be56c5d5188affe1ab6ca77ff724915ecbf923e9549083cfba34424395f5' 
  AND token = 'qXGF6q/etCvedwSIDKjH12AVpOtMsU+nHNJFTIybLq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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