SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2eb133c2476b1d864d8a158994d48b350cf478fe575287a81d32cb6814575cc' 
  AND token = 'Tx6t/aQK/mu1MSpqevupmr7KUCpV71K4+qG86fzgLzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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