Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bf991a2f7cb4150bf1601a741ba5f939340646e2796c177ceb3e04e37f8df2f' 
  AND token = '16irAl5fPMWhKj7SxFQCJdKrU6Dfa5fzoNdQfupEibE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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