Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9745dc13069e53f198dd5edc5d609c23b3090e9c949e1478d01827b8cd0f943' 
  AND token = '65wLK1s4671t4S1IXjeoVE6vu8/OO3Ik4su1iLtghV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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