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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebd9546fde02072edf10b7591357ff5bd69efcb998f727872e36bb3e6c4fad61' 
  AND token = '0t+ACATD+iVZmewON58gOa1ZQ1lmQx1nlc8ZXpAZ1m0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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