Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5552069ef79c798e1c90fba32070be47141b60afe5ac3adee69dcd58096038cf' 
  AND token = '/GJPBuSMQJFsTYSbvRYyOoOjn9CMic4vFSUurMCFg1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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