Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '668ec09a89c3a3ca6d1f265bd8ea652d911b07961a2f1048faae38512feda28f' 
  AND token = 'vwhMBZfJqpaQVpW3CYepaoQ3ph8Yw3QsG+4G4EioHWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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