Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e6cca354df0b9800ad2934f5ea11f71aa8a8d9b309a255b3449b0a540314649' 
  AND token = 'ReE/C5SZ6Sp75N0/e9+sTdkdvpsujITaBw7pD7K4JYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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