Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ce0ddb4a51b68d15cabac7b90a016a6a44fd95083345a9fde3a598080bcde2a' 
  AND token = 'bwBlLKaUR8GDQs3WnrTB6LOnVgucEWp8VVJJ7uWXr1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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