Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '670d01556f2d505ad7d0104bcbdd657ac1e9fe5e1a89767325df4edf2dc5cca0' 
  AND token = 'mx8kQU1Ck0OISCcp/aLM5KKVPJhXIXJ7m433b7hp8pI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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