Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e73420afdaa367ae94d68f36e4c974e01b0759d0851208fefcf8de2e7c76071' 
  AND token = 'c/o8NqNc3PHoeJDEcx4nWKWXPSfwk/dhc4KRLFaPyUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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