Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f0da88a8061780dfebf43a4623dafa751734fa8f1daad0f1a1663e27fe4a304' 
  AND token = 'gg0UwkEK7esgwdluZv/qNDmWS7kHIKZF7f0IrXaW4dE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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