Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c62233b6c47cce304fc83bc9afef985414b918faba6282df97f7061b9486e3bf' 
  AND token = 'zRhX3JNduLbsIyLXh2pMG1BFa6/ynFaPIiZpjQ1TSw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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