SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd7a70f43aae68d5323624b56fbab2bfc6677f07151abfbd44cf6a24a8cc998f' 
  AND token = 'zEsV1UgLCZcDQrmpYKlW3J0FRRbvWCwuT/IRF/c35xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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