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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83451a4cd5647c75af2feee26e0d0929ae3f5818c6b7b3d3763f39b6f5c1ec5f' 
  AND token = 'L3RrieH0F5XCWxT/DE3ps0tX5h4akpTZ4VaKOdVYipg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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