Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ea440f7274f7d48cfead757026a0c055309ae3c069b9dbbe896025232c15381' 
  AND token = '+EP6/uXUm4AGOzh+OIDXFkMtPPZTCiaiCvtktdP9ozM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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