Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20c7369385ed7c578166397befa9cf17641f25541f1314aac53eacccb73b05f2' 
  AND token = 'FVBcwQzjz+yle22DAPMQ/1xJCl/aNuRQcUFE1k0qysw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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