Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43b87dfc6a5e2182b71257b42762221ae133f30bc0e14cf481a3967a8b83ec8d' 
  AND token = '1Ee3bh+/KjNN71TUo8PnW3892RpzVpSM1VMSVgCim40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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