Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccc42156dbe27ebdd90afc87b7e14eea8bc19bc71e76c411db9cc90e97703a97' 
  AND token = 'nbrLsy59z9EQ0/ajUUJsoD0lUONTLX60UGywvqP1qZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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