SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '165156f259a47166e70fc298d88c8c25e91591ccddb660344fd6133dbb7379e1' 
  AND token = 'bvB8KUDjhShxYPb6KHmuO9GjHkZa+YaNr9JJpuF2W+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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