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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '084ddf4553b376a1e596e881b633df1f332b4720accffde41d3d782a0e5414c7' 
  AND token = 'dpyjSteo1ndNZWK5DmqkQJa6iXaZe6oWd9CW5CMihe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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