Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aeb34bee519a4ea572fa8eea3ed7d13799fba35ffa7b96509b9351e2205c9a8' 
  AND token = 'uQZlHm0SXBE2r8D56JLBw59KuiM5YD1vHTH9xiQcvwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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