Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3426c8746dcc523e5fdb3705b7ea0e2d7fd9576fa037ce21cf17d35b5a053481' 
  AND token = 'FKTx46z3BquKR6Nu0Kbi8hayDg8q0s0ULqIIdSoml1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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