Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '969d5192624dcac255be37743b6f5d7d2a3f5bceb646e01efe59bb594e10d9e5' 
  AND token = 'wvwKyMKiq6HG2SDgIef7bbyL+BTARoi432iXHNbT7ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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