Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8522a7be97efe4c72ea1aee803386de9f5de6900d99d0c5beddddab2c25f9842' 
  AND token = 'DadHfFaWppJk4Ed8tucXXw91aUIfWxR2neQca+r/cDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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