SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd97720f6b1d686cbcf7a3a8a62301c052723e09bfdbff564c1eff18f145328b9' 
  AND token = 'IIMfxHsKjSdKqUYUV4Wlmbp3DRat2tQXBhBpod7fh+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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