Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4c46a3a5cbb1d30d29e28109f193d0c3dd58ece4c2de7d4872e540a05eff46a' 
  AND token = '5HbhZGKJCE6P0ErU2r769/mr1E/6/ilVpMHztiD14jU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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