Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b1101426b865a7f2c21a8bc850337b92c13138b5357ad1f41ae1d33b103047c' 
  AND token = '4m8HDzbZHTwT0tSzNijozj73OnNFpKMFVfc630G2Z/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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