Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c6a8593694c31efbb6c8f271766449c415ae606d37f2a2efab0f78c38ec7e22' 
  AND token = 'vgGEEeX0LquKE+z0SuI8mECWc0mTGgWVivw1w2G4eEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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