Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aa056bd19a6ca483dbaae46b1773233eb739e97da908a60c7a2509bf39dbe85' 
  AND token = 'LaaixTq1L5p0QbBDhobULsNBIcxQW1mk7dbkaKhOgHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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