Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fae0adb8282bd588bd7771e35c0cfdb33ac000bf5fbe2de95332c25b9eb3c3d0' 
  AND token = 'FLV9uUfaux8dUgrhrU2c7oPffVWRbM3VY7OEO1ZxvwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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