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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acc5263cf1df1c574391d5dc5ef3e59bdc7e95c3c19b8b3b1b65de4642b1fd42' 
  AND token = 'Mn0kgg9107fpAXHkN92Z40Mjewtq+gB6ldFcDs5Qq+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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