Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44b3fd359dc9890b86a6750d2831a8f28ee6abb93acca575574474480bfe7530' 
  AND token = 'vU5GMYDSbbceCi1VdK2PAsYs3gJ6scsLU96fSoZ9bV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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