Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4552060cf4a20510d2da385d99fccc203f8ee9b66f1d6beaf6480d3d884fb6b4' 
  AND token = 'FTHm5PDjbom9VU69p9DgAlxP6mri2OTgknLtsvsjV0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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