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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '872a69a7ccf66f6dc4a022366b9555b59a569fd82c45eb5bd6fa2d0d29c8a6d9' 
  AND token = '7tJPk8QNJ28q63KAHL+LmNh6Pt7J68lKQ1Wg3y2KGnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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