Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55201c23da40636104145d4ff25544f48a73f05f02cfb81218031362127380b8' 
  AND token = 'k9IVfbcxs+McOdQIL2Waq9TFAC6g+XtrDrqwSCwrR1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}