Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc11917dd20f8310facb84a2ce350e070955a497bbea1214083ef1dd53c09b8e' 
  AND token = 'iqsm43Ijh2wr8evIoYVzKPufK0tyRlcdr1Xzp7DENJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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