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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02e1af3481417ac70d75facf47fad89f7fabbd374ce4846842b176718189e725' 
  AND token = 'mpn0mUDlVi0vUk9ne2RgqEs6gRWn8TgX81J4lcnwFxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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