Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4867b304c1dbc979934bf90993de37e6bf6ad8979514100355962da697533656' 
  AND token = 'mFX/TEZDUefury+Mai/arqEeE8+gs7JU7VMzNTNMmzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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