Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d98bccdfda951b5baa4876ac375ed3f15afb2eb131e0bc092d19b761de27c99' 
  AND token = '03rS1lYu/FmSoyHWg/2OabbHCZ2bpyl9YE3iBntQg68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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